Bloody Banner
From Corsair Cove Official Wiki
Bloody Banner
Principle Building
For every Banner, increase 
Cohesion Capacity by 4.
Cohesion Capacity by 4.Construction Cost
10 
Increases Cohesion Capacity
Overview
Banners are the only way to get 125/175/250 Cohesion for the Deed.
Acquisition
The is unlocked in the Compass after reaching 3 
Empire
Strategy
Build a lot of these at the edge of the island and never worry about Cohesion again.
